Catch the case where the source element is null

Author: cedricziel

src/main/java/com/cedricziel/idea/typo3/tca/codeInsight/navigation/TablenameGotoDeclarationHandler.java

@@ -7,18 +7,18 @@
 import com.intellij.psi.PsiElement;
 import org.jetbrains.annotations.Nullable;
 
-import static com.cedricziel.idea.typo3.util.TableUtil.getExtTablesSqlFilesForTable;
+import static com.cedricziel.idea.typo3.util.TableUtil.getTableDefinitionElements;
 
 public class TablenameGotoDeclarationHandler implements GotoDeclarationHandler {
     @Nullable
     @Override
     public PsiElement[] getGotoDeclarationTargets(@Nullable PsiElement sourceElement, int offset, Editor editor) {
 
-        if (!isTablenameTcaField(sourceElement)) {
+        if (sourceElement == null || !isTablenameTcaField(sourceElement)) {
             return new PsiElement[0];
         }
 
-        return getExtTablesSqlFilesForTable(sourceElement.getText(), sourceElement.getProject());
+        return getTableDefinitionElements(sourceElement.getText(), sourceElement.getProject());
     }
 
     @Nullable
@@ -28,7 +28,6 @@ public String getActionText(DataContext context) {
     }
 
     private boolean isTablenameTcaField(PsiElement psiElement) {
-
         return TCAUtil.arrayIndexIsTCATableNameField(psiElement);
     }
 }